JPH04319687A - Optical system for light wave distance meter - Google Patents
Optical system for light wave distance meterInfo
- Publication number
- JPH04319687A JPH04319687A JP8685991A JP8685991A JPH04319687A JP H04319687 A JPH04319687 A JP H04319687A JP 8685991 A JP8685991 A JP 8685991A JP 8685991 A JP8685991 A JP 8685991A JP H04319687 A JPH04319687 A JP H04319687A
- Authority
- JP
- Japan
- Prior art keywords
- light
- optical system
- mirror
- objective lens
- distance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 40
- 238000005259 measurement Methods 0.000 abstract description 8
- 230000001678 irradiating effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Optical Radar Systems And Details Thereof (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、対物レンズを介して光
を出射する出射光学系と、対物レンズを介して入射した
光を受光する受光光学系とが同軸配置された光波距離計
用光学系に関する。[Industrial Application Field] The present invention provides an optical system for a light wave distance meter in which an output optical system for outputting light through an objective lens and a reception optical system for receiving light incident through the objective lens are arranged coaxially. Regarding the system.
【０００２】0002
【従来の技術】従来のこの種の光波距離計用光学系は、
図３に示すように、対物レンズａの後方に、発光素子ｂ
の光を反射するミラーｃが配置され、ミラーｃの後方に
、平行平面ガラスｄ、レンズｅ及びダイクロイックプリ
ズムｆから成る受光光学系ｇと視準光学系ｈとが設けら
れており、発光素子ｂの光がミラーｃで反射されて対物
レンズａから平行に出射光Ｌ１として出射し、遠距離の
測点に置かれた反射プリズムｉで反射した光が対物レン
ズａに入射し、この入射光Ｌ２はダイクロイックプリズ
ムｆで反射されて受光素子ｊに入射するようになってい
る。図３において、ｋはシャッタ機構である。[Prior Art] This type of conventional optical system for a light wave distance meter is
As shown in FIG. 3, a light emitting element b is placed behind the objective lens a.
A mirror c is arranged to reflect the light of the light emitting element b, and behind the mirror c, a light receiving optical system g and a collimating optical system h consisting of a parallel plane glass d, a lens e, and a dichroic prism f are provided. The light is reflected by mirror c and exits from objective lens a in parallel as output light L1, and the light reflected by reflection prism i placed at a distant measurement point enters objective lens a, and this incident light L2 is reflected by the dichroic prism f and enters the light receiving element j. In FIG. 3, k is a shutter mechanism.
【０００３】0003
【発明が解決しようとする課題】従来の光波距離計の上
述の光学系は、反射プリズムｉが遠方にある一般の測距
作業では、対物レンズａからの出射光Ｌ１及び反射プリ
ズムｉでの反射光は、多少拡散されるため、対物レンズ
ａへの入射光Ｌ２は出射光Ｌ１より広がり、このためミ
ラーｃがあっても受光素子ｊで受光できる。しかしなが
ら、近距離の測距作業では、対物レンズａからの出射光
Ｌ１と対物レンズａへの入射光Ｌ３が略同一の広がりと
なるため、入射光Ｌ３は、ミラーｃで邪魔されて受光光
学系ｇのダイクロイックプリズムｆを経て受光素子ｊで
受光することができないという課題があった。本発明は
、従来のこのような課題を解決する光波距離計用光学系
を提供することをその目的としたものである。[Problems to be Solved by the Invention] The above-mentioned optical system of the conventional light wave distance meter is difficult to use when the reflecting prism i is located at a far distance in general distance measuring work. Since light is somewhat diffused, the incident light L2 to the objective lens a is spread out more than the outgoing light L1, and therefore, even if there is a mirror c, the light can be received by the light receiving element j. However, in short distance measurement work, the emitted light L1 from the objective lens a and the incident light L3 to the objective lens a have approximately the same spread, so the incident light L3 is obstructed by the mirror c and the light receiving optical system There was a problem in that the light cannot be received by the light receiving element j through the dichroic prism f of g. An object of the present invention is to provide an optical system for a light wave distance meter that solves the above-mentioned conventional problems.
【０００４】0004
【課題を解決するための手段】本発明は、上記の目的を
達成するために、対物レンズを介して光を出射する出射
光学系と、対物レンズを介して入射した反射光を受光す
る受光光学系とが同軸状に配置された光波距離計用光学
系において、発光素子の光を対物レンズの方向へ反射す
る出射光学系の一部材であるミラーを、対物レンズの中
心に対して偏心させたことを特徴とする。[Means for Solving the Problems] In order to achieve the above objects, the present invention provides an output optical system that outputs light through an objective lens, and a light reception optical system that receives reflected light incident through the objective lens. In an optical system for a light wave distance meter that is arranged coaxially with the optical system, the mirror, which is a part of the output optical system that reflects the light from the light emitting element toward the objective lens, is decentered with respect to the center of the objective lens. It is characterized by
【０００５】[0005]
【作用】発光素子の光を対物レンズの方向へ反射する出
射光学系の一部材のミラーは、対物レンズの中心に対し
て偏心しているので、ミラーで反射された出射光の領域
Ａは、図２で示すように、対物レンズ１の中心０に対し
てずれる。そこで、近距離に置かれた反射プリズムで反
射されて対物レンズ１に入射する入射光は対物レンズ１
の中心０に対して対称であるから、ミラーの偏心方向の
端縁部で反射した光の入射光は、ミラーに妨げられるこ
となく、受光素子で受光することができる。[Operation] The mirror, which is a part of the output optical system that reflects the light from the light emitting element toward the objective lens, is decentered with respect to the center of the objective lens, so the area A of the output light reflected by the mirror is As shown by 2, it is shifted from the center 0 of the objective lens 1. Therefore, the incident light that is reflected by the reflective prism placed at a close distance and enters the objective lens 1 is
Since it is symmetrical with respect to the center 0 of the mirror, the incident light reflected by the edge of the mirror in the eccentric direction can be received by the light receiving element without being obstructed by the mirror.
【０００６】[0006]
【実施例】以下本発明の実施例を図面につき説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the drawings.
【０００７】図１において、対物レンズ１の後方には、
その中心０を通る対物レンズ１の光軸ｌ１に対して偏心
し且つ光軸ｌ１に対して４５°傾斜したミラー２が配設
され、ミラー２に光を入射させる反射ミラー３等から成
る光学系４及び反射ミラー３に光を入射する発光素子５
が設けられている。光学系４は、その光軸ｌ２が対物レ
ンズ１の光軸ｌ１と直角で且つ光軸ｌ１とミラー２の面
との交点０′を通るようにして出射光学系の光軸と対物
レンズ１の光軸ｌ１とを一致させ、出射光が平行光とな
るようにすると共に、発光素子５からの光の断面積を拡
げてミラー２の全面に光が当たるように構成されている
。In FIG. 1, behind the objective lens 1,
An optical system that includes a mirror 2 that is decentered with respect to the optical axis l1 of an objective lens 1 passing through its center 0 and inclined at 45 degrees with respect to the optical axis l1, and that includes a reflecting mirror 3 and the like that makes light incident on the mirror 2. 4 and a light emitting element 5 that makes light incident on the reflecting mirror 3.
is provided. The optical system 4 aligns the optical axis of the output optical system with the optical axis of the objective lens 1 so that its optical axis l2 is perpendicular to the optical axis l1 of the objective lens 1 and passes through the intersection 0' of the optical axis l1 and the surface of the mirror 2. The optical axis l1 is aligned so that the emitted light becomes parallel light, and the cross-sectional area of the light from the light emitting element 5 is expanded so that the light hits the entire surface of the mirror 2.
【０００８】前記ミラー２の後方には、前記対物レンズ
１の光軸ｌ１と同軸に平行平面ガラス６、ダイクロイッ
クプリズム７等の受光光学系８、更に視準光学系９が設
けられ、光軸ｌ１と直角方向にダイクロイックプリズム
７からの光を受光する受光素子１０が設けられている。
上記実施例の作用を説明すると、発光素子５からの光は
、光学系４、ミラー２を経て対物レンズ１から例えばＬ
４、Ｌ５なる光となって出射する。光Ｌ４、Ｌ５は近距
離の測点に置かれた反射プリズム１１でＬ６、Ｌ７のよ
うに反射して対物レンズ１から入射し、光Ｌ７はミラー
２に妨げられることなく、ダイクロイックプリズム７を
経て受光素子１０に至る。距離計測に用いる参照光は、
公知の光学系で送光信号が受光素子１０に導かれる。勿
論、計測時は、参照光が受光素子１０に導かれないよう
にシャッタ機構１２が設けられている。距離計測は、送
光信号と反射プリズムからの受光信号との距離による位
相差から求めるものである。コンピュータでは、それぞ
れの距離は補正常数を加えて補正して正確に求め、ディ
スプレイに表示される。また、これらは垂直距離及び水
平距離にも換算される。Behind the mirror 2, a parallel plane glass 6, a light receiving optical system 8 such as a dichroic prism 7, and a collimating optical system 9 are provided coaxially with the optical axis l1 of the objective lens 1. A light receiving element 10 that receives light from the dichroic prism 7 is provided in a direction perpendicular to the dichroic prism 7. To explain the operation of the above embodiment, the light from the light emitting element 5 passes through the optical system 4 and the mirror 2, and is transmitted from the objective lens 1 to, for example, L
4. It emits light as L5. Lights L4 and L5 are reflected as L6 and L7 by a reflecting prism 11 placed at a nearby measuring point and enter the objective lens 1, and light L7 passes through the dichroic prism 7 without being obstructed by the mirror 2. The light receiving element 10 is reached. The reference light used for distance measurement is
A light transmission signal is guided to the light receiving element 10 using a known optical system. Of course, the shutter mechanism 12 is provided so that the reference light is not guided to the light receiving element 10 during measurement. Distance measurement is determined from the phase difference between the light transmission signal and the light reception signal from the reflection prism depending on the distance. In the computer, each distance is calculated accurately by adding a correction normal number and displayed on the display. These are also converted into vertical distance and horizontal distance.
【０００９】[0009]
【発明の効果】本発明は、上述のように構成されている
ので、近距離の測点にある反射プリズムを視準した場合
でも、受光素子に光が入り、測定可能である効果を有す
る。Since the present invention is constructed as described above, it has the effect that even when a reflecting prism located at a nearby measurement point is collimated, light enters the light receiving element and measurement is possible.
【図１】 本発明の一実施例の構成を示す図[Figure 1] Diagram showing the configuration of one embodiment of the present invention
【図２】
本発明の作用説明図[Figure 2]
Action explanatory diagram of the present invention
【図３】 従来の光波距離計用光学系の構成を示す図
[Figure 3] Diagram showing the configuration of a conventional optical system for a light wave distance meter
Claims (1)
光学系と、対物レンズを介して入射した反射光を受光す
る受光光学系とが同軸状に配置された光波距離計用光学
系において、発光素子の光を対物レンズの方向へ反射す
る出射光学系の一部材であるミラーを、対物レンズの中
心に対して偏心させたことを特徴とする光波距離計用光
学系。1. An optical system for a light wave distance meter, in which an output optical system that outputs light through an objective lens and a reception optical system that receives reflected light incident through the objective lens are arranged coaxially, 1. An optical system for a light wave distance meter, characterized in that a mirror, which is a part of an output optical system that reflects light from a light emitting element toward an objective lens, is decentered with respect to the center of the objective lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8685991A JPH04319687A (en) | 1991-04-18 | 1991-04-18 | Optical system for light wave distance meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8685991A JPH04319687A (en) | 1991-04-18 | 1991-04-18 | Optical system for light wave distance meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04319687A true JPH04319687A (en) | 1992-11-10 |
Family
ID=13898541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8685991A Pending JPH04319687A (en) | 1991-04-18 | 1991-04-18 | Optical system for light wave distance meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04319687A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5774208A (en) * | 1995-06-19 | 1998-06-30 | Sokkia Co., Ltd. | Coaxial electro-optical distance meter |
| US6747733B2 (en) | 2001-10-30 | 2004-06-08 | Pentax Corporation | Electronic distance meter |
| US6765653B2 (en) | 2000-05-25 | 2004-07-20 | Pentax Corporation | Electronic distance meter |
| JP2004347422A (en) * | 2003-05-21 | 2004-12-09 | Topcon Corp | Ranging device |
| WO2006056475A1 (en) * | 2004-11-27 | 2006-06-01 | Leica Geosystems Ag | Telescope and pan-focal telescope comprising plan convex or plan concave lenses and deflecting means connected thereto |
| JP2008275386A (en) * | 2007-04-26 | 2008-11-13 | Hamamatsu Photonics Kk | Light wave range finder |
| JP2011511280A (en) * | 2008-02-01 | 2011-04-07 | ファロ テクノロジーズ インコーポレーテッド | Objective distance measuring device |
-
1991
- 1991-04-18 JP JP8685991A patent/JPH04319687A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5774208A (en) * | 1995-06-19 | 1998-06-30 | Sokkia Co., Ltd. | Coaxial electro-optical distance meter |
| DE19615601B4 (en) * | 1995-06-19 | 2006-10-26 | Sokkia Co., Ltd. | Electro-optical coaxial distance measuring device |
| US6765653B2 (en) | 2000-05-25 | 2004-07-20 | Pentax Corporation | Electronic distance meter |
| US6747733B2 (en) | 2001-10-30 | 2004-06-08 | Pentax Corporation | Electronic distance meter |
| JP2004347422A (en) * | 2003-05-21 | 2004-12-09 | Topcon Corp | Ranging device |
| WO2006056475A1 (en) * | 2004-11-27 | 2006-06-01 | Leica Geosystems Ag | Telescope and pan-focal telescope comprising plan convex or plan concave lenses and deflecting means connected thereto |
| JP2008522204A (en) * | 2004-11-27 | 2008-06-26 | ライカ ジオシステムズ アクチェンゲゼルシャフト | Telescope and panfocal telescope including plano-convex lens or plano-concave lens and deflecting means joined thereto |
| US7672049B2 (en) | 2004-11-27 | 2010-03-02 | Leica Geosystems Ag | Telescope and panfocal telescope comprising planoconvex of planoconcave lens and deflecting means connected thereto |
| JP2008275386A (en) * | 2007-04-26 | 2008-11-13 | Hamamatsu Photonics Kk | Light wave range finder |
| JP2011511280A (en) * | 2008-02-01 | 2011-04-07 | ファロ テクノロジーズ インコーポレーテッド | Objective distance measuring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 19990914 |